This workshop will begin by providing attendees with a background to a new novel chemical fuming process that has been shown to offer significant advantages over traditional latent fingermark enhancement processes across a range of metallic substrates (copper, brass, stainless steel, etc). Described by the UK Ministry of Defense as ‘revolutionary’ and ‘ground-breaking’, the unique ability of this process to recover fingerprint ridge patterns when none of the latent fingermark residue actually remains on the substrate (i.e. the surface has been wiped clean, washed, submerged in water, heated, or a combination of these) will be explored and practical examples illustrated and discussed. The process will then be demonstrated, and attendees of the workshop will be able to process metallic items that have been washed and fired cartridge casings. The ridge detail developed will then be imaged.